Database Isolation

Arc provides tenant-aware database naming to keep tenant data segregated while sharing infrastructure.

MongoDB Database Naming

The default MongoDB resolver appends the tenant ID to the base database name using a + separator:

{BaseDatabaseName}             // when TenantId.NotSet
{BaseDatabaseName}+{TenantId}  // when tenant ID is set

Examples:

MyDatabase             // when TenantId.NotSet
MyDatabase+acme-corp   // when tenant ID is "acme-corp"
MyDatabase+tenant-123  // when tenant ID is "tenant-123"

Entity Framework Core Database Naming

Entity Framework Core follows the same naming pattern by default, ensuring that each tenant maps to its own database name.

Chronicle Event Store Namespace

Chronicle uses the tenant ID as the event store namespace when a tenant is resolved. When no tenant is resolved, it uses the default namespace.